# !/usr/bin/env python
# -*- coding:utf-8 -*-
# @FileName : zsj.py
# @Time     : 2024/4/15 21:32
# @Author   : Robot-Zsj
"""
description:

i:
20*19*20*

o:
tst

"""

s = input()

for i in range(26, 0, -1):
    key = str(i)
    if i > 9:
        key += "*"

    val = chr(97 + i - 1)

    s = s.replace(key, val)

print(s)
